Quite soon: The injection of 250 mg of depo-medroxyprogesterone acetate usually blocks ovulation immediately when given during menstruation and this way prevents most pregnancies (91 to 96% effective). Its effectiveness is theoretically reduced if it is given after ovulation has already occurred but it becomes rapidly quite effective .
Answered 6/18/2016
1.2k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question